Filter



Nov, 19, 39350 W. A.-KUENZLE ET AL FILTER Filed April 23,. 1932 INVENTORS WALTER A. Kucrvzu CLYDE E. PLOEGER A TTORNEYS.

Patented Nov. 19, 1935 v UNITED STATES PATENT OFFICE FILTER- Application April 23, 1932, SerialNo. 607,050

8 Claims. (Cl. 210-112) This invention relates to filters for removing foreign matter such as for example fine particles or the like from the-liquid line of domestic refrigerators} a It is an object of the invention to provide a filter wherein the filtering element is Supported in a manner to prevent its being injured by shocks that would ordinarily fracture the structure, andwhi'ch is of the desired porosity and permeability .to satisfactorily perform the filtering operation.

Other objects and advantages will be apparent from the following description taken in connection with the accompanying drawing..wherein 15 Fig. l is a longitudinal section of a filter illustrating one application-of the invention;

Fig. 2 a section on the line 2-2 of Fig. l, and Fig. 3 asection on the line 3-3 of Fig. l. Referring to the drawing, refrigerant is supl and capillary tube H to a cooling unit also not shown', and a filter constituting the present invention is utilized for removing fine particles or foreign matter from the liquid supplied through the pipe lllso that it will not clog the capillary tube. Thefiltering element per se comprises a porous cup or cylinder l2 of a form similar to a. conventional test tube used in chemical laboratories and beingclosed at one end and open at 3 the other. This porous cup I2 is formed of reiractory material and of a controllable porosity and permeability, and which is not susceptible to injury by the liquid refrigerant which is filtered.

One grave problem accompanying the use of a fragile filter cup of this character is the mounting or supporting of the same in a manner such as it will not be damaged by ordinary shocks or jars, and in accordance with the present invention the difficulty is overcome by the specific g manner in which the parts are assembled.

The capillary tube His provided with a coil II to increase its flexibility, and the filter cup is mounted on the capillary tube by having its open end connected directly by means of a thin 5 brass shell IS with the capillary tube, the said tube extending through the cap and into the fil'.

ter. The connecting shell I3 is iormed with a disclike body having a central thickened hub which directly engages the capillary tube and a 50 collar or sleeve which'extends for a short distance into the end of the filter. cup. A band of solder embraces the extremity of the filter cup and intimately secures the up to the body oi! the shell I3. A screen in the form of a resilient *v shock-absorbing sleeve of reticulated wire is plied from a condenser not shown, through a pipe upon the filter cu in a sufficiently shockproof mounting to preplaced around the filter cup and forms a shockabsorbing medium between the filter cup and an imperforate shell or housing l5 which forms the outer casing of the filter. The shock-absorbing sleeve 14 is corrugated as shown in Figs. 2 and 3 and engages both the filter cup and the outer shell permitting the filter cupto move resiliently when the device receives a sudden jar or shock.

The steel shell or housing I5 is provided at one end with a threaded plug or closure head 16,10

which snugly receives the capillary tube ll, and at its opposite end with another plug or closure head l'l', provided with a longitudinal" bore or passage 18, in which terminates the pipe l0 which extends from the condenser. the closure plug ll terminates in spaced relation to the closed end of the filter cup l2, and in order .to prevent infiowing liquid refrigerant from impinging directlyon the cup, the plug is provided with a lateral bore or deflecting passage I9, 20 which communicates with the bore l8 of the plug. With this construction the pipe it! through which liquid refrigerant is supplied from the condenser and the capillary or small'tube l I through which the refrigerant is conducted to the cooling unit are connected by an imperforateshell or hous'- ing in which a porous filter member is flexibly 1 or yieldably supported, such yieldable support being the natural resiliency of the capillary tube l I enhanced by the coil II and the fluted screen I4 located between the cylindrical filter cup and its imperforate me .1 housing, thescreen being of a length to engage the end of the'housing and absorb with the capillary tube any end thrust The cup is thus maintained vent its being damaged even if the filter assemably is dropped on a hard surface from a considerable height.

It will be apparent to those skilled in the art that various other changes may be made in the construction and arrangement, without departing from the spirit of the invention, and therefore the invention is not limited to that which is described in the specification and shown in the 4.5 drawing, but only as indicated in the appended claims.

What is claimed is: 1.'A filter comprising an elongated housing, a closure for each end of the housing, a tube ex- I tending through one of said closures and proand having a concentric collar, a refractory filter-5 The inner end of lateral discharge for minating adjacent. the closed member closed at one end and having its other end fitting over the collar of the disc, a band of solder securing said filter member and disc together, the closure for the end of the housing op-' positethe tube terminating adjacent the closed.

end of the filter member and provided with a preventing direct impingement of liquid upon the filter member, and a longitudinally corrugated reticulated sleeve between the filter member and the housing and snugly engaging each, and also engaging the closure member at one end of the housing.

2. A filter comprising an elongated housing, a

closure for each end of the housing, atube extending through one of said closures and provided with a coil adjacent said last mentioned closure, a refractory filter member mounted in said housing, the closure for the end of the housing opposite the tube terminating adjacent the closed end ofthe filtermernberand provided with a lateral discharge for preventing direct impingement of liquid upon the filter member,- anda longitudireticulated sleeve between the filter member and the housing and snugly en gaging each, and

also engaging the closure memher at one end of the housing;

3. A filter comprising an elongated housing, a-

closure for each end of the housing, a tube extending closures, a refractory filter member mounted in saidhousing andha-ving one end closed, the closure into said housing through one 01 said metallic closure for the for theend of the housing opposite the tube ter-1v endof the filter member and provided with a lateral discharge for preventing direct impingement of liquid upon ;the filter member, and a perforated shock-absorbingsleevebetween the filter member and g the housing.

4. A filter comprisingan elongated housing, a closure for each end of the housing, a tube extending into said housing through one of said said housing,

closures, a refractoryfilter member mounted in and a perforated shock-absorbing sleeve between the filter member and the housing.

5. A filter comprising a housing provided with an inlet at one end, a tube projecting through the other end of the housing, a fragile filter member of refractory material open at one end, a metallic closure for the open' end of the filter member mounted on said tube, and a corrugated screen between the filter member and the casing'resiliently supporting the filter member said tube bein'gprovided with a coil between the end ofthe, housing and the filter member.

6. A filter comprising a housing providedwith an inlet at one end, a tube projecting throughthe other end of the housing, a fragile filter me ber of refractory material open at one end, a

member mounted on said tube, and a corrugated screen between the filtermember and the casing resiliently supporting the filter'member.

7. A housing, housing, a resilient conduit connected to said filter member and extending through and fixed to said housing, a screen associated with'said thereto.

- CLYDE -E. 'PLOEGER.

WALTER. A. KUENZLI.

open end of the filter I a fragile filter member in said deterioration occasioned said housing .5 

